[#1425] Add missing getters for PublishSubscribe Publisher

[maxence-d]

Notes for Reviewer

Adds allocation_strategy() and max_loaned_samples() getters to Publisher of PublishSubscribe services.
The code re-uses the same logic as other existing getters.

Pre-Review Checklist for the PR Author

• Add sensible notes for the reviewer
• PR title is short, expressive and meaningful
• Consider switching the PR to a draft (Convert to draft)
  • as draft PR, the CI will be skipped for pushes
• Relevant issues are linked in the References section
• Branch follows the naming format (iox2-123-introduce-posix-ipc-example)
• Commits messages are according to this guideline
  • Commit messages have the issue ID ([#123] Add posix ipc example)
  • Keep in mind to use the same email that was used to sign the Eclipse Contributor Agreement
• Tests follow the best practice for testing
• Changelog updated in the unreleased section including API breaking changes
• Assign PR to reviewer
• All checks have passed (except task-list-completed)

PR Reviewer Reminders

• Commits are properly organized and messages are according to the guideline
• Unit tests have been written for new behavior
• Public API is documented
• PR title describes the changes

References

Closes #1245

[elBoberido]

Looks good overall. Just some formatting issues. Could you also try to add these new functions to the Python bindings?

[elfenpiff]

@maxence-d, great to see your first, of hopefully many, pull requests!

[codecov]

Codecov Report

❌ Patch coverage is 92.30769% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 77.43%. Comparing base (c94534d) to head (a164681).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
iceoryx2-cxx/include/iox2/enum_translation.hpp	80.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1428      +/-   ##
==========================================
- Coverage   77.45%   77.43%   -0.03%     
==========================================
  Files         419      419              
  Lines       39349    39375      +26     
  Branches     1284     1285       +1     
==========================================
+ Hits        30479    30489      +10     
- Misses       7833     7847      +14     
- Partials     1037     1039       +2     

Flag	Coverage Δ
CPP	67.30% <85.71%> (+0.06%)	⬆️
Rust	77.28% <92.30%> (-0.03%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
iceoryx2-cxx/include/iox2/publisher.hpp	67.10% <100.00%> (+1.82%)	⬆️
iceoryx2/src/port/publisher.rs	92.96% <100.00%> (+0.25%)	⬆️
iceoryx2-cxx/include/iox2/enum_translation.hpp	48.47% <80.00%> (+0.40%)	⬆️

... and 11 files with indirect coverage changes

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[maxence-d]

I just saw the coverage values
will add tests